Biological Starter Fertilizer Soil Activator Supergro® 1-0-4 is an organic liquid plant food designed for soil and foiliar application. It contains extract from the fermentation of protein and amino acids. Supergro® 1-0-4 can be used on all plants including but not limited to: avocado, citrus, fruit trees, grape,lawn,nut trees, ornamental house plants, berries. and all vegetables.